Herrmann wolff



Units TATES ATENT tries.

HERRMANN \VOLFF, OF NE\V YORK, N. Y., ASSIGNOR OF T\VO-THIRDS TO ALEXANDER MENKE AND HERMAN O-PPENHEIMER, OF SAME PLACE.

ARTIFICIAL Fl.) EL.

SPECIFICATION forming part of Letters Patent No. 623,504, dated April 18, 1899.

Application filed April 20, 1898. serial No. 678,250. (No specimens.)

To all whom it may concern: united, the same are allowed to cool off to Be it known that'l, HERRMANN VVOLFF, a about 100 Fahrenheit. Then one part of citizen of Germany, and a resident of New benzin is added thereto and the fluid slowly York, county and State of New York, have reheated. Then the comixture of coal-dust 5 invented certain new and useful Improveand pitch is successively added thereto and ments in Artificial Fuel, of which the followthe whole, while constantly kept warm, thoring is a full, clear, and exact specification. oughly mixed. The composition is then in a My invention relates to compounding of nearly plastic state and in condition to be fuel materials; and it consists of a oomposiformed into bricks or briquets by suitable 6o 10 tion of matter suitable for use as fuel for any machinery. The briquets, while yet warm, and all suchpurposes as natural coalis used. in forms are conveyed to a hydraulic press The composition consists of the following and there subjected toa pressure of approxis ingredients: coal-dust or pulverized lignite, mately two thousand five hundred pounds per pitch, wax-tailings, barium sulfate, and bensquare inch, and after being thus compressed 15 zin, compounded as hereinafter described and are allowed to harden in the atmospheric air.

then formed into briquets of suitable size and The compounded fuel when dried is hard shape and compressed in hydraulic press to and compact, though not brittle, and may render the composition absolutely compact then immediately be used or stored.

and hard. With regard to the wax-tailings I desire to 20 My newly-invented artificial fuel is capastate that though this ingredient is in itself 1 ble of being stored or transported in the same meltable by heat it enters with the barium manner as natural coal, will not disintegrate sulfate in some such chemical combination or decompose when exposed to air, heat, or by which its capacity of being melted by heat moisture, and its capacity for producing heat is destroyed, and consequently when the fuel J 25 will not be affected by long storage. In this is used in furnace its binding material does respect my compounded fuel is preferable to not melt and the briquets behave in fire the natural coal. Its heat-producing capacity is same as natural coal of very good quality.

as great as that of best coal, and as it does They do not disintegrate or bake. They burn not deteriorate it can be kept stored for an in the same manner as natural coal, slowly or 3o indefinite period of time and under any confiercely, according to the quantity of the draft ditions. of air supplied to the furnace.

Another and also very important advan- WVhen usingthe term coal orcoal-dust tage of my compounded fuel is that when in this specification, it is to be understood as prepared as hereinafter described the briembracing not only anthracite or bituminous 35 quets may be piled up in rows like buildingorso-callcd soft coal,but also lignite,which bricks and kept for an indefinite time in some experts believe to be a different subclosed bunkers or bins without any danger of stance from coal, whereas others hold it to be instantaneous combustion, nor will the fuel merely an imperfect kind of coal.

produce any explosive,combustible, or other- The relative quantity of the ingredients 0 o wise dangerous gases whatsoever. may be varied; but the proportion as stated The composition is compounded of the above will produce the best composition suitabove enumerated ingredients as follows: able as artificial fuel for any purpose for which The coal-dust, eighty-nine parts, in Weight, natural coal can be used. is mixed with six parts of finely-pulverized I claim as my invention, and desire to se- 5 5 pitch, and while the mixing is done the incure by Letters Patent gredients are heated to Fahrenheit. At 1. A composition of matter suitable for use the same time wax-tailings, three parts, is as fuel, comprising coal-dust, pitch, wax-tailinelted by heating it slowly to boiling heat, ings, barium sulfate, and benzin. approximately to 220 Fahrenheit, and then 2. A composition of matter suitable for use I00 50 one part of barium sulfate added thereto. as fuel, comprising eighty-nine parts of coallVhen these two ingredients are thoroughly dust, six parts of pitch, three parts of waxwith the coal-dust and pitch thoroughly, and fourth, forming and compressing the mixed ingredients into briquets of suitable shape and size.

In witness that I claim the improvements described in the foregoing specification I have signed my name in the presence of two subscribing Witnesses.

HERRMANN lVOLFF;

\Vitnesses:

HENRY SCHREITER, ROBERT VALENTINE MATHEWS. 

